He won a trip to Wikimania, Wikipedia’s annual conference, set for London next summer, including travel and accommodation.

The Wiesen Viaduct, 88 metres high and 204 metres long, was completed in 1909 for the Davos-Filisur railway and later served as the inspiration for a 1926 painting by German expressionist artist Ernst Ludwig Kirchner.

It is the largest stone bridge on the Rhaetian Railway, according to Wikipedia.